An ass grenade is a shit that has so much force behind it, the shit explodes out of your ass, smashes into the water of the bowl and causes a huge wave of shit-sprinkled water droplets all of over the walls and floor.
This is the shit equivalent of a 500 pound man jumping off of a two story building into a one foot high swimming pool.

The end result leaves shit-shrapnel everywhere!

1. Who in the hell ate the "dog-zilla" from Byron's? Whoever did left a huge ass grenade in the bathroom and should clean it up!

When your shitting and it explodes in your toilet like grenades
The feeling of World War 3 out of your asshole
Heavy amounts of shit
Long pieces of shit or multiple shits
M.O.A.S (M.other O.f A.ll S.hits) basically

Bro I ate at this Mexican place,i later murdered my toilet with Ass Grenades
Bro i took the M.O.A.S yesterday i couldn't sit for a week
Dude my Ass Grenades clogged my toilet for a couple of days